Minimum tissue required for hydra regeneration
Article Abstract:
The minimum tissue size required for regeneration of Hydra magnipapillata was determined by allowing small, flat square tissue pieces excised from its wildtype polyps to regenerate. An examination of the size-dependent characteristics of head regeneration was also carried out. The smallest spherical shell that was assumed by the tissue pieces measured 0.2 mm in diameter and contained 270-300 epithelial cells. Only 47% of these shells underwent head regeneration in 5.5. days. Moreover, the results indicate that the reaction-diffusion mechanism determine the minimum tissue size for regeneration.
Publication Name: Developmental Biology
Subject: Biological sciences
ISSN: 0012-1606
Year: 1993
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Genetic analysis of developmental mechanisms in hydra: XX. Cloning of interstitial stem cells restricted to the sperm differentiation pathway in Hydra magnipapillata
Article Abstract:
A study was conducted on Hydra magnipapillata polyps whose interstitial stem cells were capable of differentiating only into sperm and not into somatic cells. Clones of these pseudo-epithelial hydra were obtained and maintained through force-feeding. All specimens developed interstitial cells during the study period but produced neither nematocytes or nerve cells. Instead, all interstitial cells developed into gametic cells. These results suggest that Hydra magnipapillata's interstitial stem cell population has a subpopulation whose cells are limited to the germ line differentiation pathway.
Publication Name: Developmental Biology
Subject: Biological sciences
ISSN: 0012-1606
Year: 1993
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Nematocyte differentiation in hydra: commitment to nematocyte type occurs at the beginning of the pathway
Article Abstract:
A study was conducted to examine the question of commitment to type within the class of nematocytes from multipotent stem cells of the hydra, with the assumption that commitment to type is contradictory. Using the desmoneme pathway, it was shown that cell differentiation in nematocytes occurs at the beginning of the pathway. The approach used in arriving at the conclusion is discussed.
Publication Name: Developmental Biology
Subject: Biological sciences
ISSN: 0012-1606
Year: 1995
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